crypto/sparcv9cap.c: fix overstep in getisax.
crypto/sparcv9cap.c: fix overstep in getisax.

Problem was introduced in 299ccadcdb99001c618d188fb243c1caaaa86a1c
as future extension, i.e. at this point it wasn't an actual problem,
because uninitialized capability bit was not actually used.

Reviewed-by: Tim Hudson <eb0be8e447f673b41b10eda09d63cd72526b0a42@openssl.org>

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl